男性，46岁，农民，反复多关节肿痛伴晨僵6年，诊断为类风湿关节炎，长期服中药和布洛芬等消炎止痛药治疗，仍逐渐出现双手掌指关节半脱位和尺侧偏斜，近1年关节疼痛加重，尤右膝关节明显，行走困难并出现反复上腹疼痛，空腹及夜间明显，6个月前曾呕吐过咖啡样物。查体：上腹部轻压痛，右手第3及左手第2、3近指关节肿，右膝关节肿胀、屈曲畸形。X线示右膝关节多处骨质增生，关节间隙消失，化验大便潜血(+)。请回答下列问题：

类风湿性关节炎治疗原则?

You hear on the radiotelephone the word “Securite” spoken three times. This indicates that（）.

A.a message about the safety of navigation will follow

B.a message of an urgent nature about the safety of a ship will follow

C.the sender is in distress and requests immediate assistance

D.you should secure your radiotelephone